GlobalEventHandlers.onmouseup

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The onmouseup property of the GlobalEventHandlers mixin is an EventHandler that processes mouseup events.

The mouseup event fires when the user releases the mouse button.

Note: The opposite of onmouseup is onmousedown.

Syntax

target.onmouseup = functionRef;

Value

functionRef is a function name or a function expression. The function receives a MouseEvent object as its sole argument.

Example

In this example, a piece of "toast" hides when you click down with the mouse, and reappears when you release. It uses the onmousedown and onmouseup event handlers.

HTML

<div class="container">
  <div class="toaster"></div>
  <div class="toast">Hello world!</div>
</div>

CSS

.container {
  position: absolute;
  left: 50%;
  bottom: 20px;
  transform: translate(-50%);
}

.toaster {
  width: 160px;
  height: 110px;
  background: #bbb;
  border-radius: 10px 10px 0 0;
}

.toast {
  position: absolute;
  left: 50%;
  top: 50%;
  z-index: -1;
  width: 100px;
  height: 50px;
  padding: 10px;
  background: #ed9;
  border-radius: 10px 10px 0 0;
  transform: translate(-50%, -90px);
  transition: transform .3s;
}

.depressed {
  transform: translate(-50%, -50%);
}

JavaScript

function depress() {
  toast.classList.add('depressed');
}

function release() {
  toast.classList.remove('depressed');
}

const toaster = document.querySelector('.toaster');
const toast = document.querySelector('.toast');

toaster.onmousedown = depress;
document.onmouseup = release;

Result

Specification

Specification Status Comment
HTML Living Standard
The definition of 'onmouseup' in that specification.
Living Standard  

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
onmouseupChrome Full support YesEdge Full support YesFirefox Full support YesIE Full support YesOpera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesFirefox Android Full support YesOpera Android Full support YesSafari iOS Full support YesSamsung Internet Android Full support Yes

Legend

Full support  
Full support

See also